Believe it or not, "ice" climbs form in the Flatirons. They tend to provide a strange experience as they frequently feel serious and committing despite their proximity to Boulder. Protection tends to be scarce as does ice that provides good sticks, however the angle of the routes tends to compensate for the thickness and quality of the ice. The routes on the Flatirons seem to come in a few days after a big dump of snow during cold weather.
All of the documented routes are in the northern Flatirons, so park at Chataqua.
Though not as continuous as the other Flatirons routes, this has one superb pitch on it. Your goal is the gully that lies between the Pullman Car and the South Block on the Second Flatiron. Start at the Gutter bouldering area and climb easy mixed ground towards said gully. The gully itself currently has a vein of ice in the back of it that is a couple of feet wide and 1-3 inches thick for approximately 50m. At the top of this ribbon of ice you'll find a nice ledge to belay from. Easy mixed climb...[more]Browse More Classics in CO
I've done two ice climbs in the southern Flatirons. A three-pitch-or-so line forms almost every November of December up an otherwise undistinguished crag high on Bear Peak, to the south of Shanahan Crag. A fairly obvious talus slope diagonals up and left to reach it. A good three- or four-pitch line formed one year in the late 80s or early 90s up the middle of the east face of the Goose. We called it Wild Goose Chase, but I think Greg Davis and a partner had climbed it the week before (and probably Gary Neptune years before that). Both were fun and interesting and impossible to rate, like true alpine climbs: thin ice and mixed scratching on the 50-degree Flatiron slabs. Every Boulder ice climber should do one of these Flatiron ice climbs someday. They're unique and right in our backyard.